The CMB2 plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the '<textarea_code field id> (e.g. kl_code, kl_post_code)' parameter in all versions up to, and including, 2.13.1 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The front-end save path requires only a CMB2 box nonce, which is emitted to all visitors including unauthenticated guests via a simple GET request, making the attack trivially reachable without any credentials on sites that expose a public CMB2 form writing a textarea_code field.
History

Sun, 04 Oct 2026 22:15:00 +0000

Type Values Removed Values Added
First Time appeared Jtsternberg
Jtsternberg cmb2
Wordpress-extensions
Wordpress-extensions cmb2
Vendors & Products Jtsternberg
Jtsternberg cmb2
Wordpress-extensions
Wordpress-extensions cmb2

Sat, 03 Oct 2026 16:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 02 Oct 2026 07:45:00 +0000

Type Values Removed Values Added
Description The CMB2 plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the '<textarea_code field id> (e.g. kl_code, kl_post_code)' parameter in all versions up to, and including, 2.13.1 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The front-end save path requires only a CMB2 box nonce, which is emitted to all visitors including unauthenticated guests via a simple GET request, making the attack trivially reachable without any credentials on sites that expose a public CMB2 form writing a textarea_code field.
Title CMB2 <= 2.13.1 - Unauthenticated Stored Cross-Site Scripting via 'textarea_code' Field
Weaknesses CWE-79
References
Metrics cvssV3_1

{'score': 7.2, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: Wordfence

Published: 2026-10-02T07:39:22.836Z

Updated: 2026-10-03T15:42:50.014Z

Reserved: 2026-09-29T16:39:17.455Z

Link: CVE-2026-102772

cve-icon Vulnrichment

Updated: 2026-10-03T15:40:23.180Z

cve-icon NVD

Status : Deferred

Published: 2026-10-02T08:17:00.047

Modified: 2026-10-03T16:16:32.563

Link: CVE-2026-102772

cve-icon Redhat

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